The Cooler,fluid,transmission, cataloged under National Stock Number 2520-01-436-4589, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2520-01-436-4589 |
| Primary Part Number | 1764AS357-1 |
| Item Name | Cooler,fluid,transmission |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Length | 28.560 INCHES NOMINAL IN |
| Oil Flow Rate | 35.0 GALLONS PER MINUTE |
| Criticality Code Justification | FEAT |
| Style Designator | UPRIGHT STRAIGHT FINNED TYPE |
| Tube Attachment Method | BRAZED BOTH ENDS |
| Height | 26.000 INCHES NOMINAL IN |
| Thickness | 2.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 1764AS357 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 1764AS357-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 1764AS357-1 PRIMARY | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 65108 | 5/1 Secondary reference U.S. Government activity |
| 65108 | 5/9 Secondary reference Interstate Power Systems Inc |
NSN 2520-01-436-4589 is a Cooler,fluid,transmission, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-01-436-4589 has 3 manufacturer part numbers on file: 1764AS357 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 1764AS357-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 1764AS357-1 (Lake Shore Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-443-0068. Verify interchangeability with system specifications before substitution.
Key specifications for 1764AS357-1: Heat Transfer Method: INDIRECT; Length: 28.560 INCHES NOMINAL IN; Oil Flow Rate: 35.0 GALLONS PER MINUTE; Criticality Code Justification: FEAT. 8 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.